Yie Ar Kung-Fu (Chinese: ????, pinyin: y? èr g?ngf?, literally: "One Two Kung Fu") features the protagonist Oolong (Chinese: ??, pinyin: W?lóng, Japanese: ???? ?ron, see oolong) (renamed Lee for the MSX and Famicom ports), controlled by the player.

Oolong must fight all the martial arts masters given by the game (11 in the arcade version, five to 13 in the home ports) to win the title of "Grand Master" and honor the memory of his father. On his side is a variety of punch and kick blows reachable by combining the joystick with one of the buttons (punch or kick). He also has the greatest jumping ability of all the game's fighters, with the exception of "Blues".